I have a Modbus device which I pull data from and then scale it in Groov. Works great.
Now I want to manipulate that data in Node-RED. I thought I should be able to access that data from a Groov Read node but that node only lets me read from a Groov datastore.
How can I read my nicely scaled values into Node-RED? If I just read the raw Modbus values then I have to scale them in Node-RED. Since these are 4-20mA values I have to use some formula that I’ve never understood. The nice thing about the Groov scaling is it does that for you.